Doorstop



Patented May 15, 1934 UNITED STATES PATENT OFFICE 3 Claims.

The invention relates to door stops or checks, by which doors may bereadily secured in open or partly open position, and particularly towedge-shaped rubber stops for this purpose.

5 This stop is of circular, or approximately circular form and isprovided with a flat bottom and a yielding conical or rounded top. Theouter edge of the stop is made thin enough to pass beneath the ordinarydoor, while the center is thicker than the distance usually foundbetween the iloor and the bottom of the door; so that the edge of anypart of the stop will pass beneath the door, while the central part Willrise above the bottom of the door, thus causing the door to 'L come torest at some point on the surface of the stop between the margin and thecenter.

The object of the invention is to provide what is in effect a circularor substantially circular resilient rubber stop, which shall bewedgeshaped from the periphery toward the center, so that the thin edgewill readily pass beneath the door in whatever position it may be placedupon the floor, and the Wedging action will become effective in any andall positions.

Certain other features of construction will be more fully understoodfrom the details of the description.

In the drawings:

Fig. 1 is a perspective View of a door with my improved stop lying onthe oor and extending beneath the door, thus holding the door in openposition.

Fig. 2 is an enlarged top plan view of the stop shown in Fig. 1.

V Fig. 3 is a sectional view of the stop, taken on the line 3 3 of Fig.2.

Fig. 4 is a plan view of a somewhat modied form of stop.

Fig. 5 is a sectional View of this modification Vprojecting beneath adoor, and showing how the soft material of the stop is distended ordisplaced 1n use.

Referring to the drawings, the form of the invention shown in Figs. 1, 2and 3 will be rst 'jdescribed The character 10 designates the body ofthe stop. As shown it is represented as being circular or substantiallycircular in outline. The outer edge 11 is made comparatively thin, whilethe central part 12 is made much thicker, thus `giving the wholestructure the eiect of a circular wedge.

As shown in Fig. 1, the stop is lying on the iioor, with one edgeextending beneath a door, which is here represented by 13.

5g The configuration of the top of the stop may assume any one ofseveral shapes. It may constitute a true cone; or it may be a true curveof a sphere; or the surface from the margin to the central part mayassume what is known as a reversed curve. The exact cross sectional formis c@ not of the substance of the invention, it being essential onlythat the outer margin be sufliciently thin to pass beneath the door,.While the central portion shall be so thick that preferably this partwill not normally pass beneath the door.v

As here shown, the body of the stop is provided With a plurality ofopenings 14. These holes enable the user to insert the lingers and thusreadily grasp the body of the stop. These holes as here made aresubstantially perpendicular to the upper surface, thus passing throughthe body in an inclined direction, so that a better hold may be obtainedthan would be possible if the holes went vertically through the mass.

It is preferable that these holes pass entirely through the stop so thatdirt and dust will not be held therein.

As here illustrated the top of the stop is serrated or roughened inaccordance with any preferred design; but it is to be understood thatthis roughened surface is not of the essence of the invention, and maybe omitted if desired.

In the modification shown in Figs. 4 and 5, the body of the stop isagain represented by 10', the margin thereof by 11 and the centralportion by 85 12. A door 13 cooperates with the stop. The fingeropenings 14 are identical with those shown in Figs. 1, 2 and 3, andserve the same purpose as the finger openings of the preferred form.

The stop shown in Figures 4 and 5 differs from 90 that shown in theother figures only in the general configuration of the top of the stop.This is here illustrated as having what is known as a reverse curveformation; that is, starting from the edge of the disk the top surfaceassumes first a concave form and then a convex form, thus giving aholloWed. out effect near the edge, and a higher center with a roundedtop.

Moreover, the top surface of this form of the invention, instead ofbeing merely roughened or serrated as in the form shown in Figs. 1, 2and 3, is provided with annular concentric grooves 15. As hereillustrated these grooves extend from the outer margin to near thecenter of the stop. This arrangement makes annular raised portions 16105 between the depressions upon which the door may catch and hold.

Referring to Fig. 5, it will be observed that the edge of the doordeiiects the mass of the material more or less, as shown for instance at17, thereby partially embedding itself in the mass of the rubber ofwhich the stop is made.

The bottom of the stop shown in Figs. 1, 2 and 3 is flat; but in theform shown in Figs. 4 and 5, the bottom is roughened as at 18, so thatthe stop may better adhere to the floor.

The stop is molded from rubber, or some rubber composition which willsatisfactorily answer thev purpose. This composition may vary more orless, depending upon the exact use to which it is to be put. Forordinary household purposes, the body should be of rubber which iscomparatively soft, so that the door may deect the mass of the ma terialwithin certain limits to obtain a binding or wedging action. For somepurposes, however, a stiffer composition might be preferred.

The stop being circular or substantially circular in configuration withthe thickened portion in the middle of the body, it can readilybelwedged' beneath the door by simply placing the stop upon the'floorv andforcing it beneath theA door in any position in which it happens tofall. Ir'rother Words, it becomes in effect acircular wedge, which isbound to function in every position. Aivvedge of the usualshape must besomewhat carefully placed with the thin edge beneath the door; but withmy improved stop, no particular placing of the same is necessary;itswedging action becomes effective under all conditions;

By the terms circular and substantially circular, as used herein, I donot mean to specify an exact geometrical gure of this shape; but theterms are intended to cover all forms and shapes which comprise a moreor less continuous narrow edge and a thicker center.

Having thus explained the character and nature of the invention, What Iclaim is:

1. A door stop comprising a body of resilient material having a flatbottom `ada-pted to rest upon the floor, a cone shaped top adapted tocooperate with a door, and nger openings extending through the body bymeans of which the stop may be grasped.

2. A door stop comprising a body of resilient materialhaving a roughenedbottom to rest upon the oor, a cone shaped top with Which the door `isadapted to cooperate, and nger openings extending diagonally through thebody from the top to the bottom thereof by means of which the stop maybegrasped;

3;',Avdoor' stop comprisnga body. of resilient materialhav-ing arbottomadapted to rest upon the floor, a: cone shaped top adapted, to beengaged bythe bottomV of a door, andnger openings extending into thebody by which the stop may be` engaged;

GUSTAVUS yW. THOMPSON.

